<div class="sample46"></div>

.sample46{
width:104px;
height:104px;
border-radius:50%;/*角を丸めて円に*/
margin:0 auto;/*中央寄せ*/
background-color:#fc0;
background-image:
linear-gradient(-144deg,#fff 29px,transparent 0),
linear-gradient(-36deg,#fc0 18px,transparent 0),
linear-gradient(-72deg,#fff 29px,transparent 0),
linear-gradient(144deg,#fff 29px,transparent 0),
linear-gradient(36deg,#fc0 18px,transparent 0),
linear-gradient(72deg,#fff 29px,transparent 0);
background-position:
52px 36px,52px 94px,52px 94px,
52px 36px,52px 94px,52px 94px;
}

<center><a href="URL" class="sample46A">リンク文字</a></center>

.sample46A{
display:inline-block;/*a要素に幅と高さを指定する時に必要*/
width:104px;
height:104px;
border-radius:50%;/*角を丸めて円に*/
color:#666;/*リンク文字の色*/
font-weight:bold;/*リンク文字を太字に*/
text-decoration:none;/*リンク文字の下線を消す*/
line-height:100px;/*リンク文字を中央に(縦方向)*/
text-align:center;/*リンク文字を中央に(横方向)*/
background-color:#fc0;
background-image:
linear-gradient(-144deg,#fff 29px,transparent 0),
linear-gradient(-36deg,#fc0 18px,transparent 0),
linear-gradient(-72deg,#fff 29px,transparent 0),
linear-gradient(144deg,#fff 29px,transparent 0),
linear-gradient(36deg,#fc0 18px,transparent 0),
linear-gradient(72deg,#fff 29px,transparent 0);
background-position:
52px 36px,52px 94px,52px 94px,
52px 36px,52px 94px,52px 94px;
}